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Thanks for the additional plots. They offer some additional thoughts.
WYFF comes up to 9.2 db signal strength at 40'. This is doable and allows us to abandon WYCB. You have a chance at mostly reliable reception of WYFF at this elevation.
A test would be to mount the DB8e on your roof with both panels pointed to magnetic 200. I'd expect FOX, CW and PBS with ease. The acid test will be if NBC pops in.
This would relieve you of the HD1850 all band antenna. You could go small, almost an HBU 22 orientated to magnetic 180 to 190 in replacement. This would receive ABC and CBS.
The signal combiner system is still the same as before.
Now, how do you get the antennas to 40 to 45'? If your roof is 25 at it's highest point you can purchase a chimney mount and get a 10' pole. That gets you 35'. Another option is a Rohn push up mast. They come in heights up to 55'. These would need some form of reenforcement. The push up mast though is if 35' doesn't work and you want to test the next level.
Thus, I'll amend my prior ideas. For a test, I'd get a chimney mount for the antennas, a 10' 1 and 1/4" metal pole from your local hardware store. Mount DB8e on top, HBU 22 on bottom. After combining antennas (DB8e UHF/HBU22 VHF) into one lead... test reception.
This is the entry level test to see if you can get NBC without going to the next level.
Cheers
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